hallett



@einen tetra strnt @fitter E. r. PORTER AND e. W.. HALLETT, or WATEarosnNEWIYoRK.' i Letters Patent No. 71,411, dated November 26, 1867.

IMPROVEMENT IN DOOR-LOCKS.

" at Sastul referat tu it tigen @terminent mit linking `ont uitte time. i

TQ ALL WHOM IT MAY CONGERN:

4 Be it known that we, E. P. PORTER and' G. W. HALLETT, of Waterford, in` thc county of Saratoga, and State of New York, have invented new and useful Improvements in Locks; and we do hereby declare that the` following is a full, clear, and exact description thereof, which will enable others skilled in'th'eart to make and use the same, reference being had to the accompanying drawings, forming part ot" this specification.

' The` present invention relates to a lock, heretofore patented by us on the twenty# xth dayMofM'arch; ALD. 1867, which Alock embraced4 a series of four or more catches arranged to engage with the bolt, each and all of which catchesl have to *be thrown back separately by the key in the operation of unlocking, in which position they are retained by suitable spring-catches, when all having been thus thrown back the bolt'i's freetfor opera-` tion by the key, or, in other words, td be drawn in or thrown or moved out'. And Vthis invention consists- First, inv so arranging theV said catches, and cam-shaped pieces or' lift-ups," as werintend to .denominate them, that if the key, in being moved from one catch toanotherV in the operation of unlocking, be not partially i or suiicientlywithdrawn for its bit to pass over the said lift-ups, it will, by passing underthempso raise or lift them as to release 'the catch or catches previously disengaged fom the bolt, that, then ilying orswinging backto' their original position4 i'n contact with the bolt, -m'ust again be disengaged therefrom before the bolt can` be drawn,whereby,'tol a person or personsv nnacquainted with such operationof the lock, even thoug'liin possession of a key or keys thereto, Vr'nuch annoyance, hindrance, and trouble will beoccasioned, as they must from time torti-me, before completing the movements requisiteto release all the catches, disturb `eitherone or more of the lift-ups, and thus necessitate a repetition of the operation of releasing the catchesto aV greater or less citent. v

Second, the combination with the catches tothe .bolt of a series of slides, eitherjmore or less `in number,

so constructed and arranged as to'be thrown into such a position, as the key is turned, as will prevcntthe catches being `swung back too far for the springcatches,'which hold them out of contact` with the bolt, to properly i engage with them therefor. l

In the accompanying plate of drawings our improvements in locksareillustrated- F'igure 1 being a view of the interior of the casing to a lock provided with a lockinglmeelianism, embraced i in the Letters Patent hereinbefore referred to, in combination with our improvements constituting this-invention. Figure 2, a transverse section, taken in the plane of the line a: w, iig. 1. i

Figure 3, a view of the key to the lock. Similar letters oi'` reference indicate corresponding parts. 4 A, in the drawings, represents the casing of the lock. B, the bolt thereto, arranged tomove within in the lock-casing, and to project, when properly thrown therefrom, through thefront or faceplate C to the casing. l

This'bolt B is slotted at D, in the direction and for a'. portion of its length, by which slot itmovesupon the iiired key-pin or spindleE to the back plateoi` the lockoasing. i H H, a series of catches, each hung upon a fulcrum pin or centre, I, of the lock-casing, two upon each side oi` A the bolt, along and in the same`direction with which they extend. These. catches H areall of a similar form or shape, which consists in rounding oit' their ends toward the key-pin E, in'an outward direction therefrom, and in forming at their opposite ends a square-shaped shoulder, J, which shoulder-pieces J of the two catches, toward the inner end of the bolt, iit` over such end with the shoulder-pieces oi' the other catches engaged with the shoulders K, formed by the crosspiece Liof the bolt,`

at or'near the `face-plate to the lock. For the two catches of thc lock upon `the same side of the bolt, a bent springM, is provided, that at its centre is xed in position to the lock-casing, but at its ends isloose, bearing by them against the catches at or near their shouldered ends. The' object ofthe bent springsis to hold the catches against the bolt, and, when disengaged therefrom by any suitable means, to throwr .them back into cont nection with them. Each catch H is provided with a similar tubular-shaped arm, N, through e'ach oifwhich a pin or stud, O, is arranged to play, resting `by its lower end against theface of the bolt, where,ihy meansof a :bent spring, P, for each pin, each pin is firmly heldin-such position. Upon each edge or side of the bolt corre# sponding in position to the pins O in each case, 1s a similar notch or way, thcupper surface of` which is inclined from one end to the other, with a shoulder at one end. The upper end of each of the studs O `isheaded, and by such heads the two studs, upon opposite sides of the bolt, at the same end, are `hung in the slotted ends of` the side arms O2, to lever P2, that by one end are hung so as to swing upward from the bolt, and at their other ends O2, project into the plane of movement of the bit to the key, when it is swung around upon the centre-pin, as will be hereinafter described. The under side ofthe ends Oi to the levers P2, are made of a cam-shape, so that if the key-bit passes under them it will raise or lift them, and thus lift the studs O which they carry, whereas, between their upper faces and the lock-casing, there is a suicient distance for the bit to pass by, if properly drawn out therefrom. T T, pins or studs secured to back plate of lock-casing, which pins act as guards to two of the spring-catches, and not only prevent their being tampered with by inserting any implement in the keyhole of the lock, but also serve to confuse a person if unacquainted with its construction in attempting to unlock it. U U U, guard-pieces in the lock-casing to the two sides of bolt B, for a similar purpose to that of the pins or studs T. V, a lug en bolt against which the bit of the key, shown in fig. 3, is to act for moving or throwing the bolt in or out, as the case may be, when such key is brought to bear against it in the proper direction therefor, provided all the spring-catches have been released from the bolt. X, a spring-catch, secured to the lockcasing in proper position to engage with the lock-bolt, and hold it when thrown out, as well also to bc acted upon and depressed bythe key when pushed inwarthand thus relieved from the bolt previous to its being moved er drawn in by the action of the key against the lug-of the bolt.v

When thelock is to be locked, the key is first inserted in the key-hole of its casing, and then turned around until it comes against the lug V of the bolt, when, turning the key in the same direction to that in which the `bolt is to move, the bolt can be thrown out, and the loch thus locked, in which position, by the spring-catches which then interlock therewith, the bolt is held and secured, as has been hereinbefore explained. The catch X also serves to hold it, and with the catches H the bolt cannot be drawn in until they have been one and all released therefrom. In unlocking the lock, the several catches H arc released from the bolt, by properly bring- .ing the key to bear against them for turning them on their fulcrum-pius I, where, by the pins O in the ways of the bolt, they are held, when, then, bringing the key against the bolt-lug V, pressing it inwai d, and at the same time turning it, the catch X is released from the bolt, and the bolt moved and drawn into the lock-casing. In the operation of releasing the catches H from the bolt to unlock it, it isnecessary to pass or swing the bit of the key by the ends of the levers P2, and if, in passing by them, the bit should move under them, they will be lifted thereby, and thus, as the Slides or pins Q, are hung to such levers, they will be lifted, leaving the catches H free to swing into position and become engaged with the'bolt, whereby, before the bolt can be drawn in, they must again be disengaged, whereas if the bit is drawn out suiiciently to pass over such levers, no action will be produced upon them, and consequently no disturbance of the position of the catches.

A", slides Earranged. within the lock-casing, one upon the upper and the other upon the lower side of the bolt. These slides are provided with lugs, against which the bit of the liey abuts as it is turned with thelock,

' and thus the said slides moved suilicient for them to prevent the catches H being swung too far, as and fora purpose hereinbefore stated.

We claim as new, and desire te secure by Letters Patent- The combination, with the catches H, of the levers er lift-ups P2, or their respective equivalents, when combined together, substantially as and for the purpose described.

We also claim the slides A2, either one armere, substantially as and for the purpose specified.

E. P. PORTER, G. W. HALLETT.

Witnesses:

JOHN F. PRUYN, C. A. WALDnoN. 

